NES2
This is a high quality NES (Nintendo Entertainment System) and famicom emulator. (135 games included)
This is a pretty good free emulator with the usual popup ads that do not affect game play.
The only problem is in order to add or remove games you need a rooted device and a root browser app.
Games location:
/data/data/sss.dsgondar.e002nes/files/mygamedir/
* Modern, cool-looking & user friendly interface
* Highly customizable virtual controller! You can adjust the size and position of each button to suit your needs.
* Backup memory and save state support, state files
* Uses FCEU-compatible cheat files (.cht extension) with editing features
* Zapper/Gun support, touch screen to fire, touch & hold outside of display area to simulate firing away from the TV
* Configurable on-screen multi-touch controls
* HID Bluetooth/USB gamepad & keyboard support compatible with any input device recognized by the OS, Wii controllers also supported if running Android 4.1 or lower, all devices support custom key profiles
* Works in any orientation